Turn-table



G. T. PARRY.

(No Model.)

TURN TABLE.

N0. 338,357. Patented Mar. 23, 1886.;

g Ill/111111111) N. FEYER$ Phahrlhhognphur. Washinglun. D. c.

UNITED STATES PATENT OFFICE.

GEORGE T. PARRY, OF PHILADELPHIA, PENNSYLVANIA.

TURN-TABLE.

SPECIFICATION forming part of Letters Patent No. 338,357, dated March23, 1886. Application filed October 13, 1885. Serial NoJISLTlB. (N0model.)

.To all whom it may concern:

Be it known that I, GEORGE T. PARRY, of the city and county ofPhiladelphia, and State of Pennsylvania, have invented an Improvement inTurn-Tables, of which the following is a specification.

My invention has reference to railroad turntables; and it consists incertain improvements fully set forth in the following specification andshown in the accompanying drawings, which form part thereof.

As commonly constructed, turn-tables are made similar to a pivot-bridge,but in which the ends are provided with rollers which run upon acircular railway, and the pivot-truss so supported is moved around byhand or by power.

In carrying out my invention I provide the turn-table with suitablemechanism, whereby the locomotive or car,through the aid of grav: ity,causes the turn-table to automatically rcvolve, and when the load is runoff on the main track, the mechanism automatically resets itself, so asto be in an operating condition upon receiving the next load.

The object of my invention is therefore to make an automatic turn-tablewhich shall obviate the necessity of an operator pushing theheavily-loaded truss around.

Under my improvement it is possible for the engineer on the locomotiveto entirely control the action of the turn-table.

In the drawings, Figure l is a sectional elevation on line 00 a: of aturn-table embodying my improvement. Fig. 2 is a plan View of same. Fig.3 is a perspective view of the automatic mechanism for actuating thedevice removed from under the turn-table. Fig. 4: is a sectionaldetailed view showing the application of air-pressure as acounter-balance in place of weights; and Fig. 5 is a plan view of amodified form of circular inclined plane-table, which may be used inplace of that shown in Fig. 3.

B is the turntable truss, and swings about in the usual well, O,which isprovided with a circular railway or track, D, adapted to receive therollers or guide-wheels b, secured upon the free ends of the truss toprevent too much vertical movement upon the ends. This truss is hingedupon the cross-bar e of the ver ticalpivotF,whichfitsintothebearingsEonthe truss. By this means the turn-table may rock in aplane parallel with its length, but not laterally. The vertical pivot Fworksin abearing, G, rising from the bed-plate H, and is connected atthe lower end to a counterbalance weight or lever, T, directly orthrough the mediation of the pipes F, upon which the pivot rests, and ismade removable by the anti-friction rollers f.

In place of the counterbalance-weight T,the bottom of the pivot F mayhave a piston, T, working in a cylinder, U, containing com pressed airas a cushion, the supply of which may be maintained by acompressing-pump, V, though in practice the counterbalanceweights wouldbe the simplest.

The bed-plate H is provided with ratchetteeth I and a circular groovefor the anti-friction balls K, and alsoabrake-flange, h, against which abrakeshoe, It, secured to a pivoted lever, B, may be pressed to controlor arrest the rotation of the turn-table, which lever is hinged to theturn-table truss and extends up to within reach of the engineer on thelocomotive or car, whereby he may without stepping to the ground applysuificient friction to prevent too rapid rotation of the turn table,'audeven arrest its rotation altogether, if desired, at any particularpoint.

Supported upon the friction-balls K is the inclined-plane plate J,provided with the circular inclined planes L, of which there may be oneor two, preferably the latter number, as shown in Figs. 3 or 5, or, ifdesired, the single outer inclined plane (shown in Fig. 5) may be usedalone. The truss B is provided with wheels or rollers M, arranged ondiametrically opposite sides of the pivot F and run upon the inclinedplanes L. Any excessive pressure put upon the turn-table will cause therollers M to run down the inclined planes, allowing the truss to beslightly lowered and simultaneously therewith revolved.

I is a pawl pivoted to the plate J, and is adapted to catch in theratchet-teeth I on the bed-plate H,to prevent the plate J from rotatingin one direction, so that theiuclined planes shall not move under thewheels M when the pressure is applied. The plate T is connected to thetruss B by a spring, N, which may be made in any suitable manner, theobject of which being that after the truss is revolved around to a givenpoint and then raised, the spring causes the plate J to turn acorresponding distance, being arrested in its movement by a stop, 0,coming in contact with the projection P on the truss, and thus returningthe highest part of the inclined plane toa position immediately'belowthe wheels M, so that ifin this new position a locomotive was run uponthe truss everything willbe in proper position for work.

Q represents the various tracks radiating from'the pivot of theturn-table, and may be provided with a lock, S, tolock the turn-table inposition when brought before the proper track, to prevent anypossibility of derailment of the locomotive.

Of course it is evident that while I have shown a coil-spring to rotatethe table J, any other equivalent device may be used, and the details ofconstruction may be modified in various ways without departing from myinvention.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In an automatic turn-table, a truss supported upon a vertical pivot,in combination with a vertical pivot supporting the truss,counterbalancing devices to keep the truss normally in a raisedposition, and selfacting mechanism, substantially as described, to causethe truss to revolve by an excessive weight and reset itself in anyposition it may be upon the removal of the load, substantially as andfor the purpose specified.

2. In an automatic turn-table, a pivoted truss,in combination with avertical pivot supporting the truss, counterbalancing devices to keepthe truss normally in a raised position, mechanism, substantially asdescribed,to cause the truss to revolve upon its being pressed downwardby an excessive weight, and a brake to control the rotation of thetruss, substantially as and for the purpose specified.

3. In an automatic turn-table, a pivoted truss, in combination with avertical pivot supporting the truss, oounterbalancing devices to keepthe truss normally in a raised posi tion, mechanism, substantially asdescribed,

to cause the truss to revolve upon its being pressed downward by anexcessive weight, and a brake to control the rotation of the truss,which is carried by the truss and extends up to within reach of theengineer on a locomotive standing upon the truss, substantially as andfor the purpose specified.

4. In an automatic turntable, a truss sup ported upon a vertical pivot,in combination with a vertical pivot supporting the truss,counter-balancing devices to keep the truss normally in a raisedposition, selfacting mechanism, substantially as described, to cause thetruss to revolve upon its being pressed downward by an excessive weightand reset itself in any position it may be upon the removal of theload,and locks to lock the truss in position after it has made anydesired portion of a revolution, substantially as and for the purposespecified.

5. In an automatic turntable, a pivoted truss, in combination with avertically-mova ble pivot supporting the truss, a counter-balance tokeep the truss normally in a raised position, and a movableinclined-plane plate having one or more inclines, and rollers carried bythe truss and adapted to run upon the inclines, substantially as and forthe purpose specified.

6. In an automatic turn-table, a pivoted truss, in combination with avertically-movable pivot supporting the truss, a counter-balance to keepthe truss normally in a raised position, a movable inclined-plane platehaving one or more inclines, and rollers carried by the truss andadapted to run upon the inclines, and mechanism, substantially asdescribed, to turn the incline-plane plate always to a position wherethe highest part of the inclines are under the supporting-rollers uponthe load being removed from the truss, substantially as and for thepurpose specified.

7. In an automatic turntable, a pivoted truss, in combination with avertically-movable pivot supporting the truss, a counter-balance to keepthe truss normally in a raised position, a movable inclined-plane platehaving one or more inclines, and rollers carried by the truss andadapted to run upon the inclines, and mechanism, substantially asdescribed, to turn the inclined-plane plate always to a position wherethe highest part of the inclines are under the supportingrollers uponthe load being removed from the truss, and a stop carried by the trussto arrest the rotation of said inclined plane plate, substantially asand for the purpose specified.

8. In an automatic turn -table, a pivoted truss, in combination with avertically-mova ble pivot supporting the truss, a counterbalance to keepthe truss normally in a raised position, a movable inclined-plane platehaving one or more inclines, and rollers carried by the truss andadapted to run upon the inclines, and mechanism, substantially asdescribed, to turn the inclined-plane plate always to a position wherethe highest part of the inclines are under the supporting-rollers uponthe load being removed fromthe truss, and a ratchet-andpawl device toprevent rotation of the inclined-plane plate, except in one direction,substantially as and for the purpose specified.

9. In an automatic turn -table, a pivoted truss, in combination with avertically-movable pivot supporting the truss, a counterbalance to keepthe truss normally in a raised position, a movable inclined-plane platehaving one or more inclines, and rollers carried by the truss andadapted to run upon the inclines, and mechanism, substantially as described, to turn the inclined-plane plate always to a position where thehighest part of the inclines are under the supporting-rollers upon theload being removed from the truss,

IIO

and a brake carried by the truss to control its rotation, substantiallyas and for the purpose specified.

10. The combination of a vertically-movable truss, B, havingguide-wheels b,and rails, with the railway D and the main track Q, inwhich in the normal position of the truss where fully raised and free toswing in any horizontal position, the rails thereon are above the maintracks a distance equal to the height of the wheels b above the tracksD, substantially as and for the purpose specified.

11. In an automatic turn-table, the combination of thetruss B, thevertical pivot F, the counter-balanceT, bed-plate H, plate J, having oneor more inclines, L, and rollers M, adapted to run upon the inclines andcarried by the truss, substantially as and for the purpose specified.

12. In an automatic turntable, the combination of the truss B, thevertical pivot F, the counter-balance T, bed-plate H, plate J, havingone or more inclines, L, spring N, and rollers M, adapted to run uponthe inclines and carried by the truss, substantially as and for thepurpose specified.

13. In an automatic turn-table, the combination of the truss B, thevertical pivot F, the counter-balance T, bed-plate H, having ratchet I,plate J, having one or more inclines, L, pawl I, and rollers M, adaptedto run upon the inclines and carried by the truss, substantially as andfor the purpose specified.

14. In an automatic turn-table, the combination of the trussB,thevertical pivot F, the counter-balance T, bed-plate H, having ratchetI, plate J, having one or more inclines, L, spring N, pawl I and stop 0,and rollers M, adapted to run upon the inclines, and carried by thetruss, substantially as and for the purpose specified.

15. In an automatic turn-table, the combination of the truss B, thevertical pivot F, the counter-balance T, bed-plate H, having flange h,plate J, having one or moreinclines, L, and rollers M, adapted to runupon the inclines and carried by the truss, and brake B R, carried bythe truss, substantially as and for the purpose specified.

16. In an automatic turn-table, the combination of the truss B, thevertical pivot F, the counter-balance T, bed-plate H, plate J, havingone or more inclines, L, and rollers M, adapted to run upon theinclines, and carried by the truss, and anti-friction balls between thebed-plate H and plate J, substantially as and for the purpose specified.

In testimony of which invention I hereunto set my hand.

GEORGE T. PARRY.

Witnesses:

R. M. HUNTER, VVILLIAM G. h/IAYNE.

